JP3217455U - Underground obstacle crushing and removing device - Google Patents

Abstract

An underground obstacle crushing / removing device that efficiently crushes and removes obstacles in the ground is provided. A rotating shaft 18 that is driven to rotate and expands and contracts in a vertical direction, a cylinder 20 that is disposed so as to surround a lower end portion of the rotating shaft 18, and a plurality of cutting bits that are attached to the lower edge of the cylinder 20. 26 and one end are fixed to the lower end portion of the rotating shaft 18 and the other end radially expanded around the rotating shaft 18 is fixed to the inner wall of the cylinder 20 so as to protrude in the direction opposite to the rotating direction. A plurality of arms 28 curved in a straight line, a plurality of penetrating bits 30 fixed to the side surfaces of the arms 28 facing the rotation direction, and fixed to the lower end portion of the rotary shaft 18, with the pointed tip pointed downward The crushing bit 32 and the inner bit 34 fixed to the inner wall of the lower end portion of the cylinder 20 are provided. [Selection] Figure 1

Description

  The present invention relates to an underground buried object crushing and removing device for removing an underground buried object such as an existing pile while crushing.

  Various devices have been developed for crushing and removing underground buried objects such as reinforced concrete piles (Patent Document 1). This Patent Document 1 also introduces various devices having similar purposes.

Utility Model Registration No. 3205279

The known prior art has the following problems to be solved.
The purpose of removing the underground burial is to eliminate the obstacles to the construction of new buildings, and it is desirable that the construction be carried out as quickly as possible. For this purpose, the function of stripping underground objects as large as possible and pulling them up to the ground is required. The present invention has been made to achieve such an object.

  The following configurations are means for solving the above-described problems.

<Configuration 1>
A cylinder 20 disposed so as to surround a lower end portion 19 of the rotary shaft 18 to be rotationally driven;
A plurality of cutting bits 26 attached to the lower edge of the cylinder 20;
One end is fixed to the lower end portion 19 of the rotating shaft 18, and the other end radially expanded around the rotating shaft 18 is fixed to the inner wall of the cylinder 20, and curved so as to protrude in the direction opposite to the rotating direction. A plurality of arms 28,
A ground obstacle crushing / removing device comprising a plurality of penetration bits 30 fixed to side surfaces of the arms 28 facing in the rotational direction.

<Configuration 2>
2. The underground obstacle crushing and removing device according to Configuration 1, further comprising an inner bit 34 fixed to the inner wall of the lower edge of the cylinder 20.

<Configuration 3>
The underground obstacle crushing and removing apparatus according to Configuration 1 or 2, further comprising a crushing bit 32 fixed to the lower end portion 19 of the rotating shaft 18 and having a downwardly sharpened tip.

The underground obstacle mass 24 can be taken into the cylinder 20 and peeled off, and the mass 24 can be grasped and efficiently lifted to the ground.
When the inner bit 34 is provided, the lump 24 can be damaged and peeled off, and supported and pulled up so as not to fall.
When the crushing bit 32 is provided at the lower end portion 19 of the rotating shaft 18, the shape of the upper surface of the lump 24 can be adjusted to protect the arm 28 and the like.

FIG. 1 is a longitudinal sectional view of the main part of the underground buried object crushing device of the present invention. FIG. 2 is an explanatory diagram of construction using the device of the present invention. FIG. 3 is a plan view of the structure of FIG. 1 viewed from above. FIG. 4 is a bottom view of the mechanism of FIG. 1 as viewed from below.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1 is a longitudinal sectional view of the underground buried object crushing apparatus of the present invention. Moreover, FIG. 2 is explanatory drawing of the construction using the apparatus of this invention.
In FIG. 2, the heavy machine 10 supports the drive unit 14 and the rotation shaft 18, and the drive unit 14 rotationally drives the rotation shaft 18. The underground buried object crushing device of the present invention is fixed to the lower end of the rotating shaft 18. The cylinder 20 fixed to the rotary shaft 18 is lowered into the ground through the work hole 12 formed in the ground.

  The rotating shaft 18 is driven to rotate by the drive unit 14 and has a structure that expands and contracts in the vertical direction. The rotating shaft 18 is driven to insert the cylinder 20 deeply into the ground while rotating to crush the underground buried object 16. The rotating shaft 18 is rotated by a hydraulic mechanism, a motor, or the like, and is driven to extend and contract. And it is driven so that the lump of the underground buried object 16 crushed and peeled off by the following mechanism may be pulled up to the ground.

  The underground object 16 is a pile or the like to be removed. The cylinder 20 covers the upper end of the underground buried object 16 and operates so as to peel off a part thereof. The cylinder 20 constituting the underground buried object crushing device by the internal structure is detachably attached to the lower end of the rotating shaft 18.

  As shown in FIG. 1, this device fixed to the lower end of the rotary shaft 18 includes a support frame 22 on the upper inner side of the cylinder 20, and includes an arm 28 and bits for crushing various structures. The lower end of the rotating shaft 18 is fixed to the support frame 22.

  The lower end portion 19 of the rotary shaft 18 extending below the instruction frame 22 shown in FIG. 1 rotates integrally with the rotary shaft 18 in a coaxial manner, but a part of the rotary shaft 18 may be extended as it is, A columnar member separate from the rotating shaft 18 welded to the center of the support frame 22 may be used.

FIG. 3 is a plan view of the structure of FIG. 1 viewed from above.
In this figure, the structure on the back of the support frame 22 is indicated by a thin broken line because the figure is difficult to see.

  The cylinder 20 is disposed so as to surround the lower end portion 19 of the rotation shaft 18. The cylinder 20 is a steel cylinder having a diameter of, for example, 0.6 to 2.05 meters and a thickness of 40 mm. The cylinder 20 rotates integrally with the rotary shaft 18, and a part of the underground object 16 is removed. Used for stripping.

  As shown in FIG. 3, a support frame 22 assembled in a cross shape is fixed to the upper portion of the cylinder 20 by welding or the like. It consists of a pipe with a square cross section. This integrates the rotating shaft 18 and the cylinder 20. The lower end portion 19 of the rotating shaft 18 has a square cross section, which is fixed by being fitted into the square through hole 38 of the support frame 22. In this embodiment, the lower end portion 19 of the rotating shaft 18 shown in FIG. 1 is a cylinder separately fixed below the support frame 22.

  As shown in FIG. 1, a large number of cutting bits 26 are attached to the lower edge of the cylinder 20. These cutting bits 26 act by cutting the side surface and the periphery of the underground buried object 16 by the rotation of the cylinder 20 and taking a part of the mass 24 of the underground buried object 16 into the cylinder 20.

  In this example, one end of three arms 28 is fixed to the lower end portion 19 of the rotating shaft 18, is radially spread around the rotating shaft 18, and the other end is fixed to the inner surface of the cylinder 20.

FIG. 4 is a bottom view of the mechanism of FIG. 1 as viewed from below.
Also in this figure, the support frame 22 on the back surface of the arm 28 is indicated by a thin broken line because the figure is difficult to see. This is because the support frame 22 is fixed to the upper part of the cylinder 20 and the rotating shaft 18 is fixed to the support frame 22. The arm 28 is also rotated together with the cylinder 20. Each of the three arms 28 has a curved shape that is convex in the direction opposite to the rotation direction 36.

  A plurality of penetration bits 30 are fixed to the plurality of arms 28 on the side surfaces facing the rotation direction. When the rotating shaft 18 rotates in the rotation direction 36, a plurality of curved arms 28 surround the lump 24 of the embedded object. Further, the plurality of arms 28 are pressed against the mass 24 (FIG. 1) by the rotation of the rotating shaft 18.

  As a result, the plurality of penetration bits 30 bite into the mass 24. Thereafter, when the rotary shaft 18 continues to rotate with a strong force, the lump 24 is peeled off from the buried object together with the internal reinforcing bars.

  As shown in FIG. 1, a crushing bit 32 having a tip pointed downward is fixed to the lower end portion 19 of the rotating shaft 18. The crushing bit 32 cuts off the upper part of the lump 24 taken into the cylinder 20 and adjusts the shape of the lump 24.

  Further, a not-shown reinforcing bar or the like protruding above the lump 24 is crushed to prevent the arm 28 or the penetration bit 30 from getting tangled. Accordingly, the mass 24 is surrounded by the plurality of arms 28, and the arm 28 is easily pushed to the mass 24.

  As shown in FIG. 1, two to three inner bits 34 are fixed to the lower inner wall of the cylinder 20. When the lump 24 is taken into the cylinder 20, the inner bit 34 forms a spiral groove on the outer periphery of the lump 24 and bites into the outer peripheral surface of the lump 24.

  When the upper part of the lump 24 hits the lower end of the rotary shaft 18, a part thereof is scraped by the crushing bit 32, but no more enters the cylinder 20. At this time, when a strong rotational force is applied to the cylinder 20, the penetration bit 30 of the arm 28 bites into the upper portion of the mass 24 and twists strongly.

  The inner bit 34 scratches the outer peripheral surface of the lump 24 in a ring shape. When a stronger twist is applied to the lump 24, the lump 24 is broken from the ring-shaped scratches, and the lump 24 is peeled off from the underlying underground object 16.

  In this way, the lump 24 taken from the underground buried object 16 taken into the cylinder 20 is then pulled up to the ground. At this time, the inner bit bites into the lower side surface of the lump 24 and prevents the lump 24 from falling off the cylinder 20.

  The number of the arms 28 may be two or two. The number of cutting bits 26, penetrating bits 30, and inner bits 34 is also arbitrary. Since these bits are damaged or worn by use, it is preferable that both can be replaced with a removable structure.

DESCRIPTION OF SYMBOLS 10 Heavy machine 12 Working hole 14 Drive part 16 Underground object 18 Rotating shaft 19 Lower end part 20 Cylinder 22 Support frame 24 Lump 26 Cutting bit 28 Arm 30 Penetration bit 32 Crushing bit 34 Inner bit

Claims (3)

A cylinder 20 disposed so as to surround a lower end portion 19 of the rotary shaft 18 to be rotationally driven;
A plurality of cutting bits 26 attached to the lower edge of the cylinder 20;
One end is fixed to the lower end portion 19 of the rotating shaft 18, and the other end radially expanded around the rotating shaft 18 is fixed to the inner wall of the cylinder 20, and curved so as to protrude in the direction opposite to the rotating direction. A plurality of arms 28,
A ground obstacle crushing / removing device comprising a plurality of penetration bits 30 fixed to side surfaces of the arms 28 facing in the rotational direction.   The underground obstacle crushing and removing device according to claim 1, further comprising an inner bit fixed to an inner wall of a lower edge of the cylinder.   The underground obstacle crushing and removing apparatus according to claim 1 or 2, further comprising a crushing bit (32) fixed to the lower end portion (19) of the rotating shaft (18) and having a tip pointed downward.

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